/* default namespace */
@namespace "http://www.w3.org/1999/xhtml";

/* definition of "foo" namespace */
@namespace foo "http://www.msn.com/foo";
/* should generate an error for the same namespace being declared twice */
@namespace foo "http://www.contoso.com";

/* ELEMENT namespaces */

foo|bar{ color: #abc; } /* bar element in namespace foo */
|bar{ color: #fff; } /* bar element belonging to no namespace */
*|bar{ color: #000; } /* bar element belonging to any namespace (including none) */
bar{ color: #f0f; } /* bar element belonging to the default namespace */
*|* {color:#eee; } /* all namespaces and all elements */

/* ATTRIBUTE namespaces */
bar[foo|ed] {color:#111;} /* ed attribute in namespace foo */
bar[|ed] {color:#222;} /* ed attribute belonging to no namespace */
bar[*|ed] {color:#333;} /* ed attribute belonging to any namespace (including none) */
bar[ed] {color:#444;} /* ed attribute belonging to the default namespace */